A 2.2 fA/√Hz, 120 dB Dynamic Range, 12 GΩ Hybrid Readout Interface for Various Ionic Spectroscopy Applications

Islam Mostafa; Eva Maria Korek; Ralf Brederlow

doi:10.1109/ESSCIRC59616.2023.10268698

A 2.2 fA/√Hz, 120 dB Dynamic Range, 12 GΩ Hybrid Readout Interface for Various Ionic Spectroscopy Applications

Islam Mostafa, Eva Maria Korek, Ralf Brederlow

Chair of Circuit Design

Technical University of Munich

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

Abstract

This paper introduces an ultra-low noise continuous-time (CT) analog front-end (AFE) interface for ionic spectroscopy applications. The proposed readout technique combines magnitude/phase and lock-in architectures over a relatively wide frequency range, from 10 Hz to 100 kHz. This hybrid architecture enables the extension of the overall dynamic range (DR) to 120 dB. The presented AFE has a programmable transimpedance gain of 12 GΩ to cover various kinds of electrochemical impedance sensors. Moreover, the input-referred current noise reaches 2.2 fA/ Hz. This ensures a resolution of 125 fArms in a bandwidth of 2.5 kHz, which corresponds to the desired sensitivity of ionic sensing applications. The proposed readout architecture is implemented in 180 nm CMOS technology. It occupies an area of 0.7 m m2 with a total power consumption equals 3.9 mW from a 1.8 V supply voltage.

Original language	English
Title of host publication	ESSCIRC 2023 - IEEE 49th European Solid State Circuits Conference
Publisher	IEEE Computer Society
Pages	9-12
Number of pages	4
ISBN (Electronic)	9798350304206
DOIs	https://doi.org/10.1109/ESSCIRC59616.2023.10268698
State	Published - 2023
Event	49th IEEE European Solid State Circuits Conference, ESSCIRC 2023 - Lisbon, Portugal Duration: 11 Sep 2023 → 14 Sep 2023

Publication series

Name	European Solid-State Circuits Conference
Volume	2023-September
ISSN (Print)	1930-8833

Conference

Conference	49th IEEE European Solid State Circuits Conference, ESSCIRC 2023
Country/Territory	Portugal
City	Lisbon
Period	11/09/23 → 14/09/23

Access to Document

10.1109/ESSCIRC59616.2023.10268698

Cite this

Mostafa, I., Korek, E. M., & Brederlow, R. (2023). A 2.2 fA/√Hz, 120 dB Dynamic Range, 12 GΩ Hybrid Readout Interface for Various Ionic Spectroscopy Applications. In ESSCIRC 2023 - IEEE 49th European Solid State Circuits Conference (pp. 9-12). (European Solid-State Circuits Conference; Vol. 2023-September). IEEE Computer Society. https://doi.org/10.1109/ESSCIRC59616.2023.10268698

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abstract = "This paper introduces an ultra-low noise continuous-time (CT) analog front-end (AFE) interface for ionic spectroscopy applications. The proposed readout technique combines magnitude/phase and lock-in architectures over a relatively wide frequency range, from 10 Hz to 100 kHz. This hybrid architecture enables the extension of the overall dynamic range (DR) to 120 dB. The presented AFE has a programmable transimpedance gain of 12 GΩ to cover various kinds of electrochemical impedance sensors. Moreover, the input-referred current noise reaches 2.2 fA/ Hz. This ensures a resolution of 125 fArms in a bandwidth of 2.5 kHz, which corresponds to the desired sensitivity of ionic sensing applications. The proposed readout architecture is implemented in 180 nm CMOS technology. It occupies an area of 0.7 m m2 with a total power consumption equals 3.9 mW from a 1.8 V supply voltage.",

author = "Islam Mostafa and Korek, {Eva Maria} and Ralf Brederlow",

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Mostafa, I, Korek, EM & Brederlow, R 2023, A 2.2 fA/√Hz, 120 dB Dynamic Range, 12 GΩ Hybrid Readout Interface for Various Ionic Spectroscopy Applications. in ESSCIRC 2023 - IEEE 49th European Solid State Circuits Conference. European Solid-State Circuits Conference, vol. 2023-September, IEEE Computer Society, pp. 9-12, 49th IEEE European Solid State Circuits Conference, ESSCIRC 2023, Lisbon, Portugal, 11/09/23. https://doi.org/10.1109/ESSCIRC59616.2023.10268698

A 2.2 fA/√Hz, 120 dB Dynamic Range, 12 GΩ Hybrid Readout Interface for Various Ionic Spectroscopy Applications. / Mostafa, Islam; Korek, Eva Maria; Brederlow, Ralf.
ESSCIRC 2023 - IEEE 49th European Solid State Circuits Conference. IEEE Computer Society, 2023. p. 9-12 (European Solid-State Circuits Conference; Vol. 2023-September).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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AB - This paper introduces an ultra-low noise continuous-time (CT) analog front-end (AFE) interface for ionic spectroscopy applications. The proposed readout technique combines magnitude/phase and lock-in architectures over a relatively wide frequency range, from 10 Hz to 100 kHz. This hybrid architecture enables the extension of the overall dynamic range (DR) to 120 dB. The presented AFE has a programmable transimpedance gain of 12 GΩ to cover various kinds of electrochemical impedance sensors. Moreover, the input-referred current noise reaches 2.2 fA/ Hz. This ensures a resolution of 125 fArms in a bandwidth of 2.5 kHz, which corresponds to the desired sensitivity of ionic sensing applications. The proposed readout architecture is implemented in 180 nm CMOS technology. It occupies an area of 0.7 m m2 with a total power consumption equals 3.9 mW from a 1.8 V supply voltage.

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A 2.2 fA/√Hz, 120 dB Dynamic Range, 12 GΩ Hybrid Readout Interface for Various Ionic Spectroscopy Applications

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